21.   A high stone wall is the husk that protects the actor from prying curiosity seekers.

22.   They have a high wall around them, more profound than most people, more detached and scientific.

23.   The high grey walls of the Roman fort provided a screen for these modern soldiers and their bizarre equipment.

24.   Not a very high wall, at a low-security semi-open prison in Buckinghamshire.

25.   Nothing major -- the odd warehouse and high wall, the swathe of railway at roof height.

26.   All she could see in the gloom was the high stone wall of some building.

27.   A little further on she turned left down a quiet lane and pulled up outside two large gates in the centre of high walls.

28.   The high grey wall has a lip trimmed with razor wire.

29.   And its most beautiful buildings, residential palaces, tend to be behind high walls.

30.   As if in a dream, you seem to be floating through a long, narrow cavern with high walls, pink and streaked dramatically with red.